RE: [Axiom-developer] Axiom Design Question / Polymake feedback

[Page, Bill]

William,

On Wednesday, August 24, 2005 11:03 AM William Sitt wrote:
> "Page, Bill" wrote:
> >
> > I think there are two possible bug reports here:
> >
> > 1) Union ( list of alternatives that are coercible to some ring )
> >    should be a RING
> 
> No! In your case, where the arguments of the union form an ascending
> chain of rings, that would be true. In general, you cannot do
arithmetic
> with operands from different rings. Think about Union(INT, MATRIX
INT).

You are right. I was wrong. I didn't stop to think about it long enough.
Thanks.

> 
> The best one can do in Martin's case would be, as you noted,
> 
>    Union(MATRIX INT, MATRIX FRAC INT, MATRIX FLOAT)
> 

Yes, that seems workable to me.

Regards,
Bill Page.